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I have a project for school and the teacher gave us an old book, in which is the program needed is: Elliptic equations. Finite difference method.I tried to write the code in c++ from that old language. I expect it to be with errors. The problem is that I am a begginer and I tried to look on the internet but I can't find a method in c++ that I understand.
I don't know how to write the functions.
Example: u-ecuation solution
It would be a great help if someone can tell me what is missing.